1 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
17 extern crate env_logger;
20 use rustfmt::{run, run_from_stdin};
21 use rustfmt::config::{Config, WriteMode};
24 use std::fs::{self, File};
25 use std::io::{self, Read, Write};
26 use std::path::{Path, PathBuf};
28 use getopts::{Matches, Options};
30 /// Rustfmt operations.
32 /// Format files and their child modules.
33 Format(Vec<PathBuf>, WriteMode),
34 /// Print the help message.
36 // Print version information
38 /// Print detailed configuration help.
40 /// Invalid program input, including reason.
42 /// No file specified, read from stdin
43 Stdin(String, WriteMode),
46 /// Try to find a project file in the input file directory and its parents.
47 fn lookup_project_file(input_file: &Path) -> io::Result<PathBuf> {
48 let mut current = if input_file.is_relative() {
49 try!(env::current_dir()).join(input_file)
51 input_file.to_path_buf()
54 // FIXME: We should canonize path to properly handle its parents,
55 // but `canonicalize` function is unstable now (recently added API)
56 // current = try!(fs::canonicalize(current));
59 let config_file = current.join("rustfmt.toml");
60 if fs::metadata(&config_file).is_ok() {
61 return Ok(config_file);
64 // If the current directory has no parent, we're done searching.
66 return Err(io::Error::new(io::ErrorKind::NotFound, "Config not found"));
71 /// Try to find a project file. If it's found, read it.
72 fn lookup_and_read_project_file(input_file: &Path) -> io::Result<(PathBuf, String)> {
73 let path = try!(lookup_project_file(input_file));
74 let mut file = try!(File::open(&path));
75 let mut toml = String::new();
76 try!(file.read_to_string(&mut toml));
80 fn update_config(config: &mut Config, matches: &Matches) {
81 config.verbose = matches.opt_present("verbose");
82 config.skip_children = matches.opt_present("skip-children");
86 let mut opts = Options::new();
87 opts.optflag("h", "help", "show this message");
88 opts.optflag("V", "version", "show version information");
89 opts.optflag("v", "verbose", "show progress");
92 "mode to write in (not usable when piping from stdin)",
93 "[replace|overwrite|display|diff|coverage|checkstyle]");
94 opts.optflag("", "skip-children", "don't reformat child modules");
98 "show details of rustfmt configuration options");
100 let matches = match opts.parse(env::args().skip(1)) {
103 print_usage(&opts, &e.to_string());
108 let operation = determine_operation(&matches);
111 Operation::InvalidInput(reason) => {
112 print_usage(&opts, &reason);
116 print_usage(&opts, "");
119 Operation::Version => {
123 Operation::ConfigHelp => {
124 Config::print_docs();
127 Operation::Stdin(input, write_mode) => {
128 // try to read config from local directory
129 let config = match lookup_and_read_project_file(&Path::new(".")) {
130 Ok((_, toml)) => Config::from_toml(&toml),
131 Err(_) => Default::default(),
134 run_from_stdin(input, write_mode, &config);
137 Operation::Format(files, write_mode) => {
139 let mut config = match lookup_and_read_project_file(&file) {
140 Ok((path, toml)) => {
141 println!("Using rustfmt config file {} for {}",
144 Config::from_toml(&toml)
146 Err(_) => Default::default(),
149 update_config(&mut config, &matches);
150 run(&file, write_mode, &config);
158 let _ = env_logger::init();
159 let exit_code = execute();
161 // Make sure standard output is flushed before we exit.
162 std::io::stdout().flush().unwrap();
164 // Exit with given exit code.
166 // NOTE: This immediately terminates the process without doing any cleanup,
167 // so make sure to finish all necessary cleanup before this is called.
168 std::process::exit(exit_code);
171 fn print_usage(opts: &Options, reason: &str) {
172 let reason = format!("{}\nusage: {} [options] <file>...",
174 env::args_os().next().unwrap().to_string_lossy());
175 println!("{}", opts.usage(&reason));
179 println!("{}.{}.{}{}",
180 option_env!("CARGO_PKG_VERSION_MAJOR").unwrap_or("X"),
181 option_env!("CARGO_PKG_VERSION_MINOR").unwrap_or("X"),
182 option_env!("CARGO_PKG_VERSION_PATCH").unwrap_or("X"),
183 option_env!("CARGO_PKG_VERSION_PRE").unwrap_or(""));
186 fn determine_operation(matches: &Matches) -> Operation {
187 if matches.opt_present("h") {
188 return Operation::Help;
191 if matches.opt_present("config-help") {
192 return Operation::ConfigHelp;
195 if matches.opt_present("version") {
196 return Operation::Version;
199 // if no file argument is supplied, read from stdin
200 if matches.free.is_empty() {
202 let mut buffer = String::new();
203 match io::stdin().read_to_string(&mut buffer) {
205 Err(e) => return Operation::InvalidInput(e.to_string()),
208 // WriteMode is always plain for Stdin
209 return Operation::Stdin(buffer, WriteMode::Plain);
212 let write_mode = match matches.opt_str("write-mode") {
216 Err(..) => return Operation::InvalidInput("Unrecognized write mode".into()),
219 None => WriteMode::Default,
222 let files: Vec<_> = matches.free.iter().map(PathBuf::from).collect();
224 Operation::Format(files, write_mode)